// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/allocator/allocator_extension.h"

#include "base/logging.h"

#if defined(USE_TCMALLOC)
#include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
#include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
#include "third_party/tcmalloc/chromium/src/gperftools/malloc_hook.h"
#endif

namespace base {
namespace allocator {

    void ReleaseFreeMemory()
    {
#if defined(USE_TCMALLOC)
        ::MallocExtension::instance()->ReleaseFreeMemory();
#endif
    }

    bool GetNumericProperty(const char* name, size_t* value)
    {
#if defined(USE_TCMALLOC)
        return ::MallocExtension::instance()->GetNumericProperty(name, value);
#endif
        return false;
    }

    bool IsHeapProfilerRunning()
    {
#if defined(USE_TCMALLOC)
        return ::IsHeapProfilerRunning();
#endif
        return false;
    }

    void SetHooks(AllocHookFunc alloc_hook, FreeHookFunc free_hook)
    {
// TODO(sque): Use allocator shim layer instead.
#if defined(USE_TCMALLOC)
        // Make sure no hooks get overwritten.
        auto prev_alloc_hook = MallocHook::SetNewHook(alloc_hook);
        if (alloc_hook)
            DCHECK(!prev_alloc_hook);

        auto prev_free_hook = MallocHook::SetDeleteHook(free_hook);
        if (free_hook)
            DCHECK(!prev_free_hook);
#endif
    }

    int GetCallStack(void** stack, int max_stack_size)
    {
#if defined(USE_TCMALLOC)
        return MallocHook::GetCallerStackTrace(stack, max_stack_size, 0);
#endif
        return 0;
    }

} // namespace allocator
} // namespace base
